Which part of the eye changes shape in order to regulate how much light enters?

Severe reductions in the production of dopamine have been linked with Parkinson's disease.

Answer the following statement(s) true (T) or false (F)

Psychic advisers promoted in TV commercials tend to make use of the human tendency to consider personal descriptions accurate if they are stated in general terms, which is called the

a. anthropomorphic error. b. halo effect. c. courtesy bias. d. Barnum effect.